System.Configuration.StringValidatorAttribute
Declaratively instructs .NET to perform string validation on a configuration property. This class cannot be inherited.
namespace System.Configuration
{
public sealed class StringValidatorAttribute : ConfigurationValidatorAttribute
{
public int MinLength { get; set; }
public int MaxLength { get; set; }
public string InvalidCharacters { get; set; }
public StringValidatorAttribute();
}
}